Ambient Sensors in a Visiting Card holder. This one uses an ESP-01 module (Sporting the ESP8266 chip) reprogrammed to run the nodeMCU lua interpreter. A lua script reads Temperature and Humidity values from DHT11 and uploads its to ThingsSpeak.com once every minute.

Ambient Sensors in a Visiting Card holder. This one uses an ESP-01 module (Sporting the ESP8266 chip) reprogrammed to run the nodeMCU lua interpreter. A lua script reads Temperature and Humidity values from DHT11 and uploads its to ThingsSpeak.com once every minute.